How low can I go in terms of O2 during breathold? (with oxymeter)

[olivierhbh]

Hello all,

This is my first message, I'm Olivier from Geneva, Switzerland, glad to join the community .

I started dry training 2 weeks ago and during my last breathold, my oxymeter indicated 50% of O2, so just in case I stopped, even though I probably still had an extra moderately easy 30 seconds . (new pb of 4min55 still!)

How low can I safely go in terms of O2 levels?

Thank you,
Olivier.

 

[MarcinB]

In my case the lowest value on full lungs I ever measured was 41%. Usually I start to feel some signs of hypoxia around 50%. However, I'm not sure to what extent these values can be compared to yours since I use a professional device. Cheap pulsoxymeters may be highly inaccurate during breath-holding, and even the professional ones are much less accurate <60%

 

[olivierhbh]

Hi Marcin,
Thanks for your answer. I guess I can't rely on it then, that'll actually help me stay focus on relaxing not looking at it. I just read a couple of threads about the risks of dry training and I'm kind of reassured. I'll go little by little not pushing too hard and trying to stop before passing out.

 

[sorenlund]

You should also consider the lack of periferal circulation ad the bloodshift kickstarter in. If you really want to know your oxygenation you have to extract and analyse an arteriel bloodsample, and that is not very pleasant [emoji4]
I think the pulse oxymeter is accurate down to about 60-70%
Stille you can have low oxygenation in your extremities and still have a significant higher saturation in the core and brain.
So the only really low key measuring method is when you black out your level of oxygen in your brain is too low [emoji38]

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[sorenlund]

Btw some of the signs of hypoxia is a tinkling sensation in the face and tunnel vision [emoji4]

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